Diurnal variation of earth currents at the equator
| Autor: | R.W.H. Wright, Rosemary Hutton |
|---|---|
| Rok vydání: | 1961 |
| Předmět: |
Atmospheric Science
Equator Diurnal temperature variation General Engineering Equatorial electrojet Geophysics Atmospheric temperature range Atmospheric sciences Physics::Geophysics Magnetic field Diurnal cycle QUIET Physics::Space Physics General Earth and Planetary Sciences Astrophysics::Earth and Planetary Astrophysics Variation (astronomy) Geology General Environmental Science |
| Zdroj: | Journal of Atmospheric and Terrestrial Physics. 20:100-109 |
| ISSN: | 0021-9169 |
| DOI: | 10.1016/0021-9169(61)90065-4 |
| Popis: | Earth current measurements made at Legon, Ghana (5° 38' N, 0° 11' W) are analysed for a period of 15 months. From the analysis, the mean diurnal variation is found to be 180 mV/km and the current direction is shown to be at right angles to the nearby coast line. The diurnal variation of earth currents for both quiet days and disturbed days is given and the effect of the different seasons on the quiet day variation is also examined. Good agreement is found between the shape of the diurnal variation curve for earth currents and the diurnal variation of dZdt, the rate of change of the vertical component of the earth's magnetic field, and the anomalously large value of earth current amplitude is shown on comparison with data for other equatorial stations, to be related to the anomalously large daily range of Z which occurs near the equatorial electrojet. |
| Databáze: | OpenAIRE |
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